Juniper Exam JN0-649 Topic 1 Question 59 Discussion

Actual exam question for Juniper's JN0-649 exam

Question #: 59
Topic #: 1

You are asked to establish interface level authentication for users connecting to your network. You must ensure that only corporate devices, identified by MAC addresses, are allowed to connect and authenticate. Authentication must be handled by a centralized server to increase scalability.

Which authentication method would satisfy this requirement?

AMAC RADIUS

Bcaptive portal

C802.1X with single-secure supplicant mode

D802.1X with multiple supplicant mode

Show Suggested Answer

Suggested Answer: A

https://www.juniper.net/documentation/us/en/software/junos/user-access/topics/topic-map/mac-radius-authentication-switching-devices.html

You can configure MAC RADIUS authentication on an interface that also allows 802.1X authentication, or you can configure either authentication method alone.

If both MAC RADIUS and 802.1X authentication are enabled on the interface, the switch first sends the host three EAPoL requests to the host. If there is no response from the host, the switch sends the host's MAC address to the RADIUS server to check whether it is a permitted MAC address. If the MAC address is configured as permitted on the RADIUS server, the RADIUS server sends a message to the switch that the MAC address is a permitted address, and the switch opens LAN access to the nonresponsive host on the interface to which it is connected.

by Chaya at Jul 15, 2025, 03:31 AM

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Elfrieda

3 days ago

I'm not entirely sure, but I think MAC RADIUS might be too simplistic for this requirement. We need something more robust.

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Shalon

9 days ago

I remember studying about 802.1X and how it can work with RADIUS for centralized authentication. It seems like a good fit here.

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Tarra

14 days ago

Okay, I think I've got it. The key requirement here is that we need to use a centralized server to handle the authentication, and we need to verify the MAC addresses of the devices. So 802.1X with single-secure supplicant mode seems like the best choice to me.

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Yoko

20 days ago

Captive portal seems like it could work, but I'm not sure if that would give us the level of control and scalability that the question is looking for. I'm leaning more towards the RADIUS option.

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Margurite

25 days ago

Hmm, I'm a bit unsure about this one. The question mentions interface-level authentication, so I'm wondering if 802.1X might be a better fit since it operates at the port level. I'll have to think this through a bit more.

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Nan

1 months ago

I think the key here is that we need a centralized authentication method that can verify the MAC addresses of the connecting devices. That points me towards option A, MAC RADIUS.

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Rodolfo

2 months ago

I bet the person who wrote this question just learned about 802.1X yesterday. C) is the obvious pick.

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Stevie

1 months ago

Can't believe they tried to confuse us with A)!

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Twila

1 months ago

I agree, C) seems like the right choice.

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Estrella

1 months ago

Totally, 802.1X handles authentication well.

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Paola

1 months ago

For sure! Centralized control is key.

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Stephania

2 months ago

Wow, this question is so easy, a caveman could answer it. C) all the way, folks!

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Felicitas

1 months ago

User 4: Good to know, thanks for the clarification!

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Wenona

2 months ago

User 3: Agreed, using 802.1X with single-secure supplicant mode ensures only corporate devices can connect.

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Ming

2 months ago

User 2: That's correct, it's the best option for interface level authentication.

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Leonard

2 months ago

User 1: C) 802.1X with single-secure supplicant mode

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Marlon

3 months ago

That's true, but 802.1X with single-secure supplicant mode provides a more secure and scalable solution.

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German

3 months ago

B) captive portal? What is this, the 90s? C) is the modern solution for this problem.

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Leonardo

3 months ago

A) MAC RADIUS? Really? That's like using a sledgehammer to crack a nut. C) is the smart choice.

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Dannie

1 months ago

C) 802.1X with single-secure supplicant mode is definitely the way to go.

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Mitzie

1 months ago

B) I agree, C) is the smart choice for this scenario.

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Polly

3 months ago

A) MAC RADIUS? Really? That's like using a sledgehammer to crack a nut.

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Shaquana

3 months ago

But wouldn't MAC RADIUS also work for this scenario? It authenticates based on MAC addresses.

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Sharita

4 months ago

D) 802.1X with multiple supplicant mode? Nah, that's overkill for this scenario. C) is the clear winner here.

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Lourdes

3 months ago

B) Captive portal is not the right option. C) 802.1X with single-secure supplicant mode is the most suitable for this requirement.

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Frank

3 months ago

A) MAC RADIUS would not be sufficient for this scenario. C) 802.1X with single-secure supplicant mode is the best choice.

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Helga

4 months ago

I agree with Marlon. Using 802.1X with single-secure supplicant mode would ensure that only corporate devices are allowed to connect.

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Marlon

4 months ago

I think the answer is C) 802.1X with single-secure supplicant mode.

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Coral

4 months ago

C) 802.1X with single-secure supplicant mode seems like the way to go. Centralized authentication and MAC address control? Sign me up!

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Javier

4 months ago

C) 802.1X with single-secure supplicant mode is definitely the best choice for this scenario.

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Sheridan

4 months ago

B) Captive portal won't be able to handle MAC address control for corporate devices.

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Brice

4 months ago

A) MAC RADIUS wouldn't provide centralized authentication like 802.1X with single-secure supplicant mode.

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